This trial (Higa & Wididana, 1991) conducted by EM developer Professor Dr Terou Higa and Gene Widdiana at the University of Ryukus in Japan looked at the changes in the Soil Microflora Induced by Effective Microorganisms.
In the study reported here, EM cultures increased the number of Enterobacter spp. and starch digesting bacteria in soil. A combination of different EM products markedly suppressed the number of Verticillium, Thielaviopsis, and Fusarium fungal species that are destructive soil borne plant pathogens. Some of the EM cultures significantly increased the population of Trichoderma and Penicillium species that are known to suppress plant pathogenic fungi in soils: Soil physical properties, including cultivation depth and porosity, were generally improved by EM treatment.
Another trial (Lim, Pak, & Jong, 1997) conducted in Korea, the effect of EM on the number of microorganisms in the soil was measured. The below table shows that the EM treatment increased the number of aerobic bacteria, anaerobic bacteria, nitrogen-fixing bacteria and actinomycetes 10.5, 17.8, 49.6, and 1.7 times over the control, respectively.
Soil Humus Content
A Polish trial (Filarski, 2016) from the Złotów district looked at the impact EM has on the humus content of the soil. EM was applied on crop residues (straw 100% ploughed) over three years of application. This treatment was across 50 hectares with a large control area. After 3 years soil was tested for the humus content (sample 1 - EM, sample 2 - control).
View our other Trials
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Independent Trials
View TrialsIndependently managed, harvested or analysed New Zealand field trials demonstrating the commercial performance of EMNZ biological technologies under real farming conditions.
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EMNZ Replicated Field Trials
View TrialReplicated commercial field trials conducted by EMNZ to evaluate biological performance across a range of New Zealand arable, forage, horticultural and pastoral systems.
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Historical Innovation Trials
View TrialsFoundational research and development trials that helped shape the modern EMNZ product range and our understanding of biological farming systems.
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International Research Support
View TrialsPeer-reviewed international research supporting the role of Effective Microorganisms (EM) in soil biology, nutrient cycling, plant performance and crop resilience.
